简单的定时任务可以直接通过Spring自带的task来实现,复杂的定时任务则可以通过集成Quartz来实现。
Timer:这是java自带的java.util.Timer类,这个类允许你调度一个
java.util.TimerTask任务。使用这种方式可以让你的程序按照某一个频度执行,但不能在指
定时间运行。一般用的较少。
Quartz:这是一个功能比较强大的的调度器,可以让你的程序在指定时间执行,也
可以按照某一个频度执行,配置起来稍显复杂。
Task是由Spring自带的定时器,使用方便、简单
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.time</groupId>
<artifactId>TimeTask</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<!-- 声明项目配置依赖编码格式为 utf-8 -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<fastjson.version>1.2.24</fastjson.version>
</properties>
<dependencies>
<!--定时器依赖 -->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.1</version><!--$NO-MVN-MAN-VER$-->
</dependency>
<!-- 该依赖必加,里面有sping对schedule的支持 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<!--必须添加,要不然会出错,项目无法启动 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<!--devtools热部署 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
package com.tszr.time.job;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Configuration
@Component
@EnableScheduling
public class ScheduledTask {
private Logger log = LoggerFactory.getLogger(ScheduledTask.class);
@Scheduled(cron = "0 0/1 * * * ?")
public void testOne() {
log.info("每分钟执行一次");
}
@Scheduled(fixedRate = 30000)
public void testTwo() {
log.info("每30秒执行一次");
}
@Scheduled(cron = "0 0 1 * * ?") // 表示每天凌晨一点执行
public void initTask() {
// 执行任务
log.info("执行任务" + new Date());
}
}
package com.tszr.time;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableScheduling
public class TimeSpringApplication {
public static void main(String[] args) {
SpringApplication.run(TimeSpringApplication.class,args);
}
}